gst-launch-0.10 v4l2src always-copy=false device=/dev/video0 ! 'video/x-raw-yuv,width=640,height=480,framerate=30/1' ! tee name=t_vid \
! queue ! ffmpegcolorspace ! gaussianblur ! ffmpegcolorspace ! ecvthreshold ! ffmpegcolorspace ! clockoverlay halign=left valign=bottom ! xvimagesink sync=false t_vid. \
! queue ! clockoverlay halign=left valign=bottom ! xvimagesink t_vid.